Direct observation of stretched-exponential relaxation in low-temperature Lennard-Jones systems using the cage correlation function

被引：76

作者：

Rabani, E ^{[1
]}

Gezelter, JD ^{[1
]}

Berne, BJ ^{[1
]}

机构：

[1] Columbia Univ, Dept Chem, New York, NY 10027 USA

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 82卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.82.3649

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the direct observation of stretched exponential relaxation in low-temperature monatomic Lennard-Jones systems which were cooled slowly from the liquid phase to form crystals with a large number of defects. We use the cage correlation function [E. Rabani, J.D. Gezelter, and B.J. Berne, J. Chem. Phys. 107, 6867 (1997)] which measures changes in atomic surroundings to observe the stretched exponential relaxations. We obtain a distribution of hopping rates assuming that the origin of the Kohlrausch-Williams-Watts law is from static disorder in the distribution of barrier heights. [S0031-9007(99)09049-3].

引用

页码：3649 / 3652

页数：4

共 20 条

[1] ON TEMPERATURE DEPENDENCE OF COOPERATIVE RELAXATION PROPERTIES IN GLASS-FORMING LIQUIDS [J].